doubtful Antonyms

unquestionable unbending unavoidable unanswerable trustful trusting true tangible sure strong-minded steely uncontestable undaunted unmovable unmistakable univocal unfailing unevitable undubitable undoubted undoubtable undisputable undeniable steadfast staunch purposeful proven provable probative presumable presentation predicative predicable potential positive purposive questionless stanch solved single-minded settled set self-reliant self-assured sanguine resolved resolute plausible well-documented safety catch